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Forums > Silicon-package-board > Shared code - SKILL

Subject: Remove repeat item from a list
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leonlee
Posts: 81
Online: User is Offline
2/24/2006 12:08 AM  
I have tried some way to remove some repeat item from a list.
Followed is the simple one

foreach(item list
list=cons(item remove(item list))
)

Do anyone have a more available command or fuction?
Leon Lee
Schneider-Electric
natebizu
Posts: 0
Online: User is Offline
2/24/2006 7:19 AM  
This is what I use...

procedure(_removeDuplicates(masterList)
let((finalList)
foreach(item masterList
unless(member(item car(finalList))
finalList=tconc(finalList item)
)
)
finalList
)
)

If your are going through a list of dbids, then you can use memq instead of member to speed this up.
Geoffm
Posts: 0
Online: User is Offline
4/12/2006 12:20 PM  
I use "makeTable" because it doesn't accept duplicates.


below is code from a program I wrote called highlight_padstacks.il that is in the downloadable user skill zip file from cadence. I make a list by selecting all pins and via, and then load the names into a table.

padstacklist=makeTable("atable1" 0) 

axlSetFindFilter(?enabled list("noall" "pins" "vias")
         ?onButtons list("noall" "pins" "vias"))
axlAddSelectAll()
pin_list = axlGetSelSet()

foreach(pin_db pin_list
         
  padstack_db = pin_db->definition     ;Extract PadstackID from pinID
  pad_name=padstack_db->name      ;Extract Padstack Name from PadstackID
  padstacklist[pad_name]=pad_name  ;Load into table as Name:Value
                                                               
);end foreach
leonlee
Posts: 81
Online: User is Offline
1/18/2007 12:49 AM  
Now I use below code to this solution:

procedure( RemoveDuplicateItem(A)
B=nil
while(A!=nil B=cons(nth(0 A) B) A=remove(nth(0 A) A))
B
);procedure
Leon Lee
Schneider-Electric
kerchunk
Posts: 0
Online: User is Offline
1/18/2007 1:17 AM  
You could try using the unique function

For example, this will weed out all duplicate via names from a list:
via_name_list = unique(sort( via_name_list 'alphalessp))


A more-generic-but-trickier method involves using a foreach loop and the member funtion.
Someting like:


ulist = nil
foreach( obj obj_list
    unless( member( obj ulist)
        ulist = cons( obj ulist)
    );end-unless
);end-foreach



HTH,

Chris Walters
local Cadence guru
()

PS - anyone know of a position for a(nother) Cadence guru?
leonlee
Posts: 81
Online: User is Offline
1/18/2007 6:10 PM  
It's wonderful for the unique function. which user guide offers these functions?

I don't know the Cadence guru position. where~~
Leon Lee
Schneider-Electric
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Forums > Silicon-package-board > Shared code - SKILL > Remove repeat item from a list


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